"I walked into John's dressing room to meet him, and he was ironing in his underwear," Teigen told Cosmopolitan in 2014. "I said, 'You do your own ironing!?' He said, 'Of course I do.' I gave him a hug."

Teigen also revealed to Cosmo that they went back to Legend's hotel room after the shoot, ate In-N-Out burgers, and "hooked up."

"We did the music video, we were together for like 12 hours," Teigen told Wendy Williams in 2014. "We spent the entire day together, me in my underwear and him in a full suit, and I went to go say goodbye to him, to his hotel and we didn't ever say goodbye that night."

2/

Over the next year, they remained in touch but didn't define their relationship.

Legend and Teigen in 2007.
Peter Kramer/Mark Mainz/Getty Images

Shortly after the two met, Legend went on tour to promote his most recent album, "Once Again." Teigen told Cosmo in 2014 that for the next year, they texted and spoke on the phone while she tried to control her jealousy.

"I let him be himself for a while," she said. "The worst thing you can do is try to lock someone like that down early on, then have them think, 'There's so much more out there.' I played it cool for a long time. Never once did I ask, 'What are we?'"

"Marriage was never my goal, because I've never been very traditional. I was just happy to be with him."

For Legend's part, he said that he fell in love with her during that time.

"We were texting a lot, and I started to see her sense of humor," he told ET in 2016. "We would talk on the phone, and I started to fall in love with how engaging and witty and funny she is."

"Once we started spending more time together between tour stops and all this other stuff, we realized we had such a connection," he continued. "I wasn't nervous about it. When you feel a real connection to somebody, for me it wasn't nerves, it was more like excitement. 'Oh, this could be great.'"

3/

Around this time, they broke up — for half an hour.

Legend was on tour for the majority of 2007.
Ethan Miller/Getty Images

"Early on in the relationship, I was on tour with him and he'd gotten sick," Teigen revealed to Cosmo in 2016. "He was feeling really bummed and stressed out. He was like, 'I can't be in a relationship right now.'"

"I was just like: 'I'd just be happier single right now,'" he recalled. "And she was like: 'No.'"

4/

They also took their first trip to Lake Como, Italy, in 2007 — where they would eventually get married.

In 2016, Teigen posted a photo of the couple in Lake Como, Italy. She revealed that it was "where it all began" when they "first came here in 2007."

"A boat tour guide took us to a little spot on the lake and told us to make a wish," she wrote. "I asked for this to be the man I marry and have children with. I think John asked for the most perfect bite of cacio e pepe. Both came true, and here we are."

5/

February 2008: They made their red carpet debut as a couple.

Legend had won two Grammy Awards the previous year.
Frazer Harrison/Getty Images

"Chrissy was standing right next to me and I was, like, 'Oh, my God. I've hid it so well this whole time. Now as we're just about to get to the Maldives she's going to find out I have a ring in this box and it's going to ruin the surprise and I'll have to get on my knees in the airport,'" he explained during a 2013 appearance on "Oprah's Next Chapter."

"We had opened our presents beforehand, and he had only gotten me a cookbook and a Crock-Pot," Teigen explained on a 2015 episode of FABLife. "So we got into a fight, and I remember him going, 'You just wait!' And I was like, 'Wait for what?'"

Upon arriving in the Maldives, however, Teigen discovered that Legend had organized a beautiful Christmas-themed dinner proposal. The engagement ring was hiding in a silver serving dome underneath a pile of arugula.

"There was no big grand speech or anything, I think it was just very lovely and sweet to look in his eyes," she said.

7/

June 2013: Legend debuted "All of Me," a love song written about Teigen.

The intimate video featured multiple black-and-white shots of the couple together.John Legend/YouTube

"I did cry when I heard it," she told the Huffington Post. "I'm emotional, but like I don't really don't cry at things like that so yeah, it was beautiful. And live it's pretty unreal."

Teigen also starred alongside Legend in the music video for the song, which was released in October 2013 — one month after their wedding. It was shot in Lake Como and ends with actual footage from the big day.

The live version of "All of Me" was nominated for Best Pop Solo Performance at the 2014 Grammy Awards.

8/

September 10, 2013: Teigen and Legend got hitched in a quiet courthouse ceremony.

Teigen and Legend sitting front row at the Vera Wang fashion show during New York Fashion Week. Later that day, they got married.
Michael Loccisano/Getty Images

"We actually got married after going to a couple Fashion Week shows at Vera Wang, ironically who actually did my dress, but we got married at the courthouse right after," Teigen told E! News. "We are dumb and didn't realize that our Italian wedding would not be recognized unless we had a real ceremony in New York City."

May 2015: Teigen and Legend posed together for the cover of DuJour magazine.

"[Chrissy] thinks I'm not athletic enough to have a boy. I'm a musician, I'm good with women, and I'm a feminist, so I think I'll be a good 'girl daddy,'" Legend revealed.

"We want a lot of kids," Teigen added. "I would love to have three or four of my own, and then adopt a few. So basically I'll be pregnant the rest of my life."

11/

October 12, 2015: They announced Teigen's pregnancy.

Teigen and Legend in November 2015.
Mike Windle/Getty Images for A+E Networks

"John and I are so happy to announce that we are pregnant," Teigen wrote in an Instagram post.

"As many of you know, we've been trying to have a baby for a while now. It hasn't been easy, but we kept trying because we can't wait to bring our first child into the world and grow our family," she continued.

"We're so excited that it's finally happening. Thank you for all your love and well wishes. I look forward to all the belly touching!"

"It's a complete miracle when it works. There are so many people that still struggle, even with access to IVF," she said.

"You hear stories about IVF working the first try. But you'll hear a lot more stories about when it takes a few times," she continued. "You just look for anything to blame, especially yourself. I think hearing stories is just really important. You realize there's no right way to do it, or right way to react."

April 14, 2016: Teigen gave birth to the couple's first child, daughter Luna Simone.

"She's here! Luna Simone Stephens, we are so in love with you! And sleepy. Very sleepy," she wrote.

Two days later, she posted the first photo of their newborn daughter, calling her "Lulu."

Teigen has since spoken up about their difficult transition as a family of three and her experience with postpartum depression.

In a personal essay she penned for Glamour, Teigen revealed that after welcoming Luna, along with working on "Lip Sync Battle" — where her "job, essentially, is to have the best time humanly possible" — she still felt unfulfilled.

"I had everything I needed to be happy. And yet, for much of the last year, I felt unhappy," Teigen wrote.

She also wrote about her husband's help and support during this difficult time, and their hopes for a bigger family.

"I know he must look over at times and think: My God, get it together. But he has never made me feel that way," she wrote. "I love John and Luna more than I can imagine loving anything, and John and I still hope to give Luna a few siblings. Postpartum hasn't changed that."

13/

November 21, 2017: Teigen announced that she was pregnant again with an adorable Instagram video.

Teigen and Legend in December 2017.
Charley Gallay/Getty Images for GQ

The expectant mom shared a video of Luna looking at her stomach. Teigen asks, "What's in here?" from behind the camera, and Luna replies, "Baby."

True to form, Teigen sarcastically captioned the post, "It's John's!"

14/

January 28, 2018: The couple confirmed that they were expecting a baby boy.

Teigen in her second trimester, pictured in January 2018.
Phillip Faraone/Getty Images